If i was having possible signs of lung cancer pain in chest cough a ct scan would probably detect the tumor?

It should per...: Mayo Clinic: "A CT scan can reveal small lesions in your lungs that might not be detected on an X-ray. If you have a cough and are producing sputum, looking at the sputum under the microscope can sometimes reveal the presence of lung cancer cells." Ref: http://www.mayoclinic.org/diseases-conditions/lung-cancer/basics/tests-diagnosis/con-20025531

Lung cancer: Yes, it would probably detect a cancer butI would see a physician as you may have something less serious such as bronchitis and a chest X-ray may be all that is required